  
        function onover() {
            var img1 = document.getElementById('img1');
            img1.src = "images/like2.jpg";
            img1.setAttribute("onmouseout", "onout()");
        }
        function onout() {
            var img1 = document.getElementById('img1');
            img1.src = 'images/like1.jpg';
        
        }
        function clickchange() {
            var img1 = document.getElementById('img1');
            img1.src = "images/like2.jpg";
            img1.removeAttribute("onmouseout");
			img1.removeAttribute("onmouseover");
            img1.removeAttribute("onclick");
        }
         function onover1() {
            var img1 = document.getElementById('img2');
            img1.src = "images/dislike2.jpg";
            img1.setAttribute("onmouseout", "onout1()");
        }
        function onout1() {
            var img1 = document.getElementById('img2');
            img1.src = 'images/dislike1.jpg';
        
        }
        function clickchange1() {
            var img1 = document.getElementById('img2');
            img1.src = "images/dislike2.jpg";
            img1.removeAttribute("onmouseout");
			img1.removeAttribute("onmouseover");
			img1.removeAttribute("onclick");
        }

 